Electric heater for curling-irons.



M. M. BUCK. ELECTRIC HEATER FOR OURLING IRONS.

APPLICATION FILED AUG. 12, 1908.

Patented July 27, 1909.

2 SHEETS-SHEET 1.

' WITNESSES ,INVENT'OR H A Name M. M. BUCK. ELECTRIC HEATER FOR GURLING IRONS. APPLIOATION FILED AUG. 12, 1908.

928,936. Patented July 27, 1909.

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WITNESSES v I [NVE/VTOR fl/ /77,

-' I WW D s rn r,ssrarnnr oFFion- MARY MYRTLE BUCK OF MACHIAS, NEW YORK.

ELECTRIC HEATER FOR CUR LING-IROI TS.

Specification of Letters Patent.

-Patented July 27, 1909.,

I Application filed August 12, 1908. Serial No. 448,204.

To all whom it may concern Be 1t known that I, MARY MYRTLE BUCK,

- of Machias', in the county of Cattaraugus and State of New York, have invented certain new anduseful Improvements in Electric Heaters for Curling-Irons; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

' This invention relates to improvements in electric heaters for curling irons, and more particularly to such asare adapted to be con trolled by the operation of a coin,-the object of the present invention being to sim-' plify the construction of machines of this ,class and'torender the operationof themachine efhci'ent to pro erly heat curling irons 'xhaveelapsed after the insertion of a coin into the machine.

1 vided, within the casing for. the reception and tions of the coils.

without the waste orcurrent.

A further object isito provide means for automatically breaking the electric circuit when a predetermined length of. time shall With these objects view the invention =consists'ii1- certain novel features of construction and combinations of parts. as hereinafter set forth and pointed out in the claims In the accompanying drawings, Figure 1 is aviewef coin controlled curling iron heater embodying my improvements. Fig. 2 is a vertical sectional view; Fig. 3 is a transverse sectional view. Fig. 4 is a rear view with aportion of the casing broken away,

and Fig. 5'is a diagramof the electric circuits. r

1 re resents a casing having its Walls perforate to provide for suitable ventilation for the electrical devices contained therein. This casing may be provided with a suitable door 2 whereby access may be had to the interior for removingcolns therefrom or for repairing the mechamsm. A compartment 3 1s pro support of heating coils 4. These coils are made tubular and disposed so as, to communicate with openings 5 in the top of the case ing, through which openings curling ironsare inserted and the heaters may be suitably lined to prevent the end portions thereof from cominginto contact wlth the convolu -A block cor insulating material is secured Within the casing and provided'with a as sage 7 adapted to communicate withan re:

thereof opposite the strip or finger 9.

ceive coins froman inlet chute 8 in the top of v '11 is pressed to its normal position under the passage in the block by means of a spring 12 and is prevented from being moved too far by means of a stop 13 projectinglaterally from the block 6. The arm 14 of the lever 10 is provided with a lug 15 through which an adjustable screw 16 passes and the forward end of this screw is provided with a head'17 I of insulating material adapted to be engaged by the free end of a thermostat 18 and the other end of said thermostat is secured to a fixed support Within the casing. The thermostat comprises two metal bars having different qualities ofexpansion and contraction, secured together and these bars are mclosed throughout the greater portion of the length ofthe thermostatby a coil 19 of com paratively fine insulated wire, so that when said coil is included in an electric circuit it will serve to heat the thermostat and thereby cause the operation of the latter to turn the lever 10 and move the finger 11 at the lower endof said lever'out of line with the passage "(in the block 6, thus releasing a'coin and simultarieously'breaking the circuitof which said coin forms apart.

A small incandescent lamp 20 is mounted upon the casing and is connected in circuit in a manner presently explained, so that when a coin is inserted into the machinejsaid lamp will be lighted and so that when the coin has been'r'eleased from the circuit closing fingers 9 and 11 to open the circuit which includes L the heating c'oils said lamp will be eatinguished and thus indicate that the current to the heating coils has ceased,at which time the user will know that the curling iron has been properly heated.

Binding posts 212 2 may be provided on the casing for the-leading-in wires from any convenient sourceof electrical energy, pref erably from 110 volt circuit. From the binding post 21 a conductor 23 extends to one end of one of the heating coils and the other end of this coilis connected with one end of the next heating coil. The other end of the latter is connected by a conductor 24: with a binding post 25 on the lever 10.- A con ductor 26 is connected at one endwith the contact strip or finger9 and at its other end with the binding post 22. It .is apparent that when a coin-has passed throughfthe block 6 and engages the fingers 9.-1 1 so as to electrically connect them, the electric circuit willbe closed through the heating coils. One

end of the coil 19 on thermostat is connected with a binding post 27 and the other'end of said coil is connected with a binding post 28.

' The binding post 27 is connected by a conductor 29 with the conductor 23, while the' plained, the circuit which includes the coil 19 of the thermostat will also be closed and the heat generated by the passage of the current through said coil 19 will cause the thermostat to move and, through the medium of the parts "will the circuit broken.

adjustable screw 16, transmit motion to the lever 10 to cause the finger 11 to move laterally and release the coin. It is apparent that the heating of the thermostat and the consequent movement thereof will be com paratively slow and that the coin will not be released until said thermostat has moved the lever 10 a predetermined distance.

preferably be so adjusted that approximate y one and a half minutes Wlll .elapse between the time the circuit is closed by a coin until said coin shall be released and nance of the current through the heating coil can be regulated by adjusting the screw 16. i It is apparent that when the circuits of the heating coils. and thermostat coil are closed, the circuit of the lamp 20 will also be closed and that when thecoin shall have move back to its normal position and the finger 11 on the lever 10 to again assume its po sition to receive another coin.

' Various slight changes might be made in the details of construction and the arrangement of the parts without departing from the spirit of my invention or limiting its scope andhence' I do not wish to restrict us placin said lamp in parallel with the coil 19.

en the circuit of the heating coils are 4 closed by means of a coin, as above eX-' The The time of the maintecoin myself to the precise details and, arrangements of parts as herein shown and described.

Having fully described my invention what- I' claim' as new and desire .to secure by Letters-Patent, is,

1. In a machine of the character described,

the combination with electrical heatingmeans, of coin controlled circuit closing means, and means for automatically opening said circuit closing means.

2. In a machine of the character described, the combination with electrical heating means, of coin controlled circuit closing means, and thermostatic devices for opening said circuit closing means.

3. In a machine of the character described, the combination with electrical heating means, of circuit closing fingers, one of which is movable, means for directing a coin to said 1, fingers for electrically connecting them, and thermostatic devices connected with said movable contact and operative to move the movable circuit closing finger to release the coin and open the circuit after the coin has rested on said contacts a length of time measured by'the movement of said thermostatic devices.

4. In a machine of the character described, the combination with electrical" heating means, of circuit closing contacts, one of which is movable, means for directing a coin to said contacts. forelectrically" connecting them, a thermostat, devices between said thermostat and the movable contact for transmitting motion from said thermostat to the movable contact in one direction and a spring for moving said movable contact in the other direction.

- 5. In a machine of the character described,

the" combination with electrical heating means, a thermostat for opening said coincontrolled circuit closing means, a heating coil on said thermostat, and electric circuits including said electrical heating means, the heating coil on the thermostat and the circuit closing means.

6. In a machine of the character described, the combination with electrical heating means, of coin controlled circuit closing means, a thermostat, connections between said thermostat and the circuit closingmeans for controlling the latter to release a com, a heating coi-l on the thermostat, and electric circuits including said electrical heating means and the thermostat coil in parallel with each other and also including said circuit closing means.

7. In a machine ofthe character described, the combination with electrical heating. means, of a block having a coin passage therein, a contact finger at one side of said glassage, a pivoted lever having a 'contact other direction.

sage, an electric circuit including theheating I means and said contact fingers, and a thermostat for controlling the movement of said lever to release a coin from between the contact fingers.

8. In a machine of the character described, the combination with electrical heating means, of a block having a coin passage, a contact finger at one side of saidcoin passage, a pivoted lever having a contact finger at the other side of the coin passage, an elebi tric circuit including said heating means and contact fingers, a thermostat, an adjustable screw between said thermostat and thelever for effecting the movement of the latter to release a coin from between-the contact fingers, and a spring for moving said lever in the 9. In a machine of the character described, the combination with electrical heating means, of coin controlled circuit closing devices, an electric circuit including said heating means and circuit closing devices, a thermostat, and adjustable means between said thermostat and circuit closing devices for timing the operation of the latter to releasea coin therefrom. i

'. In a machine of the character described, the combination with electrical an electric circuit including the electrical heating means and the circuit closing fingers, 11;. In a machine of the character described, the combination with electrical heating means, coin controlled circuit ,closing means, a thermostat for opening said circuit closing means, a heating coil on said thermoi stat, a lamp, and electric circuits, including said electrical heating means, the heating coil and the thermostat and the lamp in' parallel circuits and also including said circuit closing means.

In testimony whereof, I have signed this specification in the presence of-two subscribing Witnesses.

- MARY MYRTLE BUCK.

Witnesses: I A RI'iBY R. NA-PIER,

BERNIECE L. 'Pnnsoo'rr. 

